package com.cust.sky.controller.user;

import com.cust.sky.constant.RedisConstant;
import com.cust.sky.constant.StatusConstant;
import com.cust.sky.entity.Dish;
import com.cust.sky.service.DishService;
import com.cust.sky.utils.R;
import com.cust.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.util.CollectionUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public R<List<DishVO>> list(Long categoryId) {

        //构造redis中的key，规则：dish_分类id
        String key = RedisConstant.DishPrefix + categoryId;

        //查询redis中是否存在菜品数据
        List<DishVO> dishVOList = (List<DishVO>) redisTemplate.opsForValue().get(key);
        if (!CollectionUtils.isEmpty(dishVOList)) {
            //如果存在，直接返回，无须查询数据库
            return R.success(dishVOList);
        }

        //如果不存在，查询数据库，将查询到的数据放入redis中
        dishVOList = dishService.listWithFlavor(categoryId);
        redisTemplate.opsForValue().set(key, dishVOList);

        return R.success(dishVOList);
    }

}
